From the publishers blurb:
The first issue of Megadungeon is upon us!
Come explore Numenhalla, the god halls. Learn about the altars and the logos, see the ettercop lair.
Articles on the pillars of megadungeon play, and using 5e and the megadungeon! Heavily illustrated by the talented OSR artists, Sam Mameli, Todd McGowan, and Kent Miller!